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1. cge
   

   Member
   Joined: May '14
   Posts: 16

   Hi everyone

   I am trying some simulation in hetrogeneous media. However,in the example, it doesn't mention if the alpha_coefficient, the attenuation coefficient can also be modified for different part of the computational domain as the density and speed

   In other guys post, they define the alpha-coefficient as: media_alpha_coe=makedisk(Nx,Ny,x0,y0)*A(A refers to any constant)

   It is clear that makedisk and other geometric functions will return a matrix. Then, for the example above, will the attenuation only be A for the places that is set to '1' by the maskdisk function above???

   Posted 10 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi cge,

   Yes, medium.alpha_coeff can be heterogeneous, i.e., defined as a matrix. In your example using makeDisk, the attenuation coefficient will be set to A within the disk, and zero everywhere else. However, you can create the matrix for alpha_coeff in any way you like, for example, having different values in different parts of the medium.

   Brad.

   Posted 10 years ago #

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